Carbureter.



W. L. MARE.

GARBURETE H.

APPLIUATION FILED MAR. 15, 1913 Patented Sept. 23, 1918.

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W'ALTER L. MARE, OF FLINT, MICHIGAN.

GARBURETER.

To all whom it may concern Be it known that I, Varxrnu L. Mann, a citizen of the United States of ."\.merica, residing at Flint, in the county of Genesec and State of Michigan, have invented certain new and useful Improvements in CarijHllQtGl'S, of which the following is a specification, reference being had therein to the accon'ipanying drawings.

In the construction of carburetors it is desirable that the parts he so disposed as to reduce possibility of leakage in the float chamber and to also check the operation of the valves to prevent battering under the rapid action to: which they are subjected when connected with motors running at high speed. It is also desirable that the parts be accessible for ready inspection, repair or replacement.

This invention relates to a carburetor and to a construction thereof that reduces liability to leakage and cushions the action of the air valve together with an arrangement of the parts which reduces the cost of manufacture and also permits easy renewal or repair of the parts, if necessary.

leakage.

The invention consists in the matters hereinafter set forth and pointed out in the appended claims.

The drawing is a View, partially in elevation and partially in longitudinal section, of one form of carburetor that embodies features of the invention.

Referring to the drawing, a casing 1 has a depending tapered hollow portion 2 that terminates in a nipple 3. A jet opening t in the upper end of the nipple 3 is controlled by a needle valveclosure 5 screwthrcaded into the nipple 3 in the usual manner with suitable stutling box or gland 6 to avoid An inverted flared or conical vaporizing tube 7 has an upper rim flange 8 seated and "secured on a corresponding flange 9 of thecasing and a lower beveled flange 10 disposed concentrically to the opening 4; around the upper end of the nippie 3. An air inlet opening 11 is in communication with the interior of the casing through the annular passage arounch the nipple 3 and through the vaporizing tube 7. An outlet passage or opening in the upper part of the casing is controlled by a throttle "alve 12, preferably of the butterfly type, that is operated by a lever 12., or the like. An auxiliary air valve casing 1 1 is removably secured in an opening in the wall of the Specification of Letters l atent. Application filed March 15, 1913. Serial No. 754,544.

Patented Sept. 23, 1913.

casing 1. An annular valve seat 15 in the upper end thereof is controlled by a closure 16 mounted on a stem 17, reciprocable in the guide opening of a boss 18 of a dash pot cylinder 19 that is adjustably secured in the casing 14:. .The upper end face of the boss 18 acts as a stop to limit the downward movement of the closure 16 so that the latter correspondingly restricts passage of air through lateral openings in the casing 14:

into the main casing 1 between the closureand valve seat 15. A disk 20 secured on the lower end of the stem 17 reciprocates in the dash pot cylinder 19, the latter being closed by a cap 21.

As a matter of good shop practice the dash pot is screwed into the casing 14 and is held in adjusted position by a screw 22 that draws together the slotted wall of the casing 1 1.

A float feed chamber 30 is removably secured on the nipple 3, preferably against a flange 23 on the latter by means of a collar 24:, suitable packing 25 being used to insure a tight joint, while the upper rim 26 is seated against the body of the casing. A suitably disposed float 27 in the chamber is arranged-to operate a fuel inlet valve that is housed in a boss 28 at one side of and integral with the float chamber. The float and supply valve do not form 7.01- 86 a part of this invention. Suitable openings 29 afford communication between the interior of thefloat chamber and the jet opening 4'.

In operation, under slow speed of motor, the air enters the using and is drawn up through the vaporizing tube around the jet opening in such way as to become thoroughly impregnated with the fuel vapor and have the required richness for starting or slow speed purposes. As the motor to which the carburetor is attached, picks up, the auxiliary air valve automatically admits the proper proportion of hir to reduce the mixture to ordinary running proportions. The auxiliary valve is readily regulated to close more or less completely, and the dash pot prevents any battering of the closure or seat. The joint between the float chamber and main casing is above the normal level of liquid in the carburetor chamber, thereby lessening the liability to leakage. All the parts are so disposed that the carburetor may be easily dismounted for inspection or repair.

Obviously, changes, in the details of construction may be made without departing flro i "he s; lit of my love; Jon and l do not iyseli to 5.4. particular form nt of parts.

a secured on. opening in the ro ided 1 an annular 0., to tie casing and ned therewith, a cloalve sent, a dish reciprocablo in the cylinder, a stern connecting theclosure and disk, e dash pot forming a stop for limiting the downward movement of the closur a float chamber remov able valve a dash pot cylinder surel'or the annular v secured the. jet opening nipple and easing:

:entric with e do too space vie depending 1 hoes, a v ot cylinder FOSS forming an d nward one clot I bloat teed again lowe portion of secured to the dependoinga;

comprising :i main ling tapered hollow ponnipple with a jet n he nipple conred vaporizing; in the casing; op'

posits the ct opening of the nipple with its lower end portion concentric with the openmg oi the nipple, the casing havlng an an" inlet opening in communication with the space between the wall of the tapered hollow portion and the vaporizmg tube, a throttle valve controlling an outlet in the casing sub.

the cylinder, a valve stem reciprocable therethrough, a disk reciprocable in the cylinder secured to the stem, a valve closure on the upper end of the stern adapted to seal an annular valve seat on the upperend of the auxiliary valve casing, the boss forming an adjustable stop for limiting the, movement of the closure, and a float teed chamber secured to the casing on the nipple and around the depending hollow portion.

41. A carburetor comprising a main cas; ing having an integ -ally formed depending tapered hollow portion, a nipple integrally formed on the lower end thereof, and prvided with a jet opening, a needle valve 010- sure,controlling the jet opei'iing, a ,jr'lared vaporizing tube reinovably secured at its upper end in an opening in the casing with its lower end portion concentric with the jot opening of the nipple, the-casing having an an inlet opening in communication with the space between the wallet the hollow depending portion and the vaporizing tube, a throttle valve controlling an air outlet intthe niain casing opposite the yaporizing tube, an auX- iliary aii' valve casing removably secured in an opening in the main casing, a dash pot cylinder longitudinally adjustable in the lower end portion of the auxiliary casing, a

guiding" boss on the upper end portionof the cylinder, :1- cap closing the-lower end of the cylinder stem longitudinally reciprocahle through a guide opening in the boss, a disk reciprocable in the cylinder secured to the stem, closure secured to the atom for an annular valve. seat on the upper end of the auxiliary casing, the boss forming a stop for limiting the movement of the 010 sure, and afloat chamber secured at its lower end to the depending nipple oi the main casing; with its upper marginal portion abutting the main casing In testimony whereof ll alibi my signature in pi esence of two witnesses.

WEllfllilt L. MARE. Witnesses hfl inroir .POLLOCK. 

